https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67628
--- Comment #2 from ktkachov at gcc dot gnu.org --- (In reply to Andrew Pinski from comment #1) > This is due to the fold-const.c optimization which should not be there any > more. You need to do benchmarking on x86 also if you remove it. > could you elaborate what optimization is that? Is it a matter of fold-const.c or match.pd canonicalizing the expression in some way?